Cora»Occultation

1998-03-21 / HIP 28954 / (39) Laetitia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Oscar Canales	O+	VIS	M200	ES		18:46:06	19:00:52.66	19:01:04.27	19:12:02	0.1	0.1	11.61	197.4
2	show	Alex Roca	O+	VIS	M200	ES	RAD		19:01:09.1	19:01:14.2		0.3	0.2	5.10	86.7
3	show	Jean Lecacheux	O+	VIS	B40	FR	RAD++	18:57:00	19:01:18.90	19:01:20.83	19:05:00	0.20	0.15	1.93	32.8
4	show	Eric Frappa	O+	VIS	B100	FR	GPS+	18:57:40	19:01:18.78	19:01:20.71	19:05:40	0.15	0.15	1.93	32.8
5	show	Jean-Claude Aveni	O+	VIS	L70	FR	RAD++	18:55:00	19:01:24.0	19:01:34.0	19:08:00	0.1	0.1	10.00	170.0
6	show	Emmanuel Beaudoin	O+	VIS	L105	FR	PHONE	18:57:00	19:00:59.40	19:01:09.40	19:30:00			10.00	170.0
7	show	Matthieu Senegas	O+	VIS	M330	FR	PHONE		19:01:08			1
8	show	O. Gadal et al	O+	VIS	M115	FR	RAD	18:46:00	19:01:05	19:01:14	19:02:00			9.00	153.0
9	show	Philippe Bernascolle	O+	VIS	B80	FR		18:49:30			19:04:30
10	show	Alain Klotz	O+	VIS	M200	FR		18:50:00	19:01:09.56	19:01:19.76	19:05:00	0.1	0.1	10.20	173.4
11	show	Pierre Jonquet	O+	VIS	M280	FR	RAD	18:42:00			19:15:00
12	show	Raymond Dusser	O+	VIS	M100	FR	RAD++	18:46:00	19:01:24.3	19:01:36.3	19:10:00	0.1	0.1	12.00	204.0
13	show	A. Fienga/A. Rouhan	O+	CCD	L260	FR	GPS	18:39:00	19:01:25.92	19:01:38.13	19:39:00	0.05	0.05	12.21	207.6
14	show	B. Gaillard et al	O+	CCD	M400	FR	RAD++	19:00:55			19:01:37
15	show	Joel Piraux	O+	VIS	L70	FR	RAD++	18:57:00	19:01:22.6	19:01:32.45	19:07:00	0.1	0.1	9.85	167.4
16	show	Nicolas Piraux	O+	VIS	M203	FR	RAD++	18:57:00	19:01:22.6	19:01:32.45	19:07:00	0.1	0.1	9.85	167.4
17	show	Carlo Frisoni	O+	VIS	M200	IT	RAD	18:51:00	19:01:54.0	19:02:01.5	19:10:00	0.2	0.2	7.50	127.5
18	show	Alberto Dalle Donne	O+	VIS	M200	IT	RAD	18:58:00	19:01:50.7	19:02:02.0	19:04:00	0.3	0.3	11.30	192.1
19	show	Julio Busi	O+	VIS	M200	IT	RAD	18:56:00	19:01:49.7	19:02:01.7	19:05:00	0.5	0.5	12.00	204.0
20	show	Roberto Di Luca	O+	VID	M400	IT	RAD++	18:55:00	19:01:49.60	19:02:01.48	19:05:00	0.04	0.04	11.88	202.0
21	show	Paolo Mangione	O+		L40	IT			19:01:52	19:02:04		0.5	0.5	12.00	204.0
22	show	Stefano Brambilla	O+	VIS	M200	IT	RAD	18:45:00	19:01:43.4	19:01:53.5	19:10:00	0.3	0.3	10.10	171.7
23	show	Emilio Colombo	O+	VIS	M150	IT	RAD	18:50:00	19:01:40.5	19:01:46.7	19:05:00	0.3	0.3	6.20	105.4
24	show	Bev Ewen-Smith	O-	VIS	M150	PT		18:54:00			18:59:00
25	show	Josep Trigo	O-	VIS	M173	ES		18:56:30			19:15:10
26	show	Josep Gomez	O-	VIS	B80	ES		18:49:05			19:12:13
27	show	Jaime Izquierdo	O-		M150	ES		18:52:14			19:12:22
28	show	Diego Rodriguez	O-		M250	ES		18:51:23			19:11:32
29	show	Jose Ripero	O-		M340	ES		18:50:15			19:10:24
30	show	Jordi Aloy	O-	VIS	M200	ES		18:53:00			19:10:00
31	show	Montserrat Gabalda	O-	VIS	M203	ES		18:53:00			19:10:00
32	show	Marc Ribo	O-	VIS	M258	ES		18:58:00			19:22:00
33	show	David Fernandez	O-	VIS	M258	ES		18:48:55			19:21:54
34	show	Xavier Otazu-Porter	O-	VIS	M150	ES		18:48:55			19:21:54
35	show	Carles Schnabel	O-			ES
36	show	Jose-Alberto Berdejo	O-	VIS	L80	ES		18:58:31			19:14:27
37	show	Ignasi Ribas	O-	VIS	M210	ES		18:49:00			19:12:00
38	show	Claudio Costa	O-	VID	M170	IT
39	show	Javier Ruiz	O-	VIS	M210	ES		18:57:00			19:10:00
40	show	Vittorio Marcelloni	O-	VIS	M350	IT		18:55:00			19:05:00
41	show	Stefano Rosoni	O-	VIS	L125	IT		18:55:00			19:05:00
42	show	Philippe Dupouy	O-			FR
43	show	Jean Montanne	O-	VIS	M200	FR
44	show	Gerard Faure	O-	VIS	M200	FR		18:49:00			19:15:00
45	show	Regis Neel	O-	VIS	M310	FR
46	show	Sandro Baroni	O-	VIS	B80	IT		18:44:00			19:12:00
47	show	Marco Cavagna	O-	VIS	B80	IT		18:57:00			19:05:00
48	show	Vince Tuboly	O-		L72	HU		18:50:00			19:10:00
49	show	Klaus Holler	O-	VIS	M400	AT		18:45:00			19:13:36
50	show	Andreas Neumeister	O-	VIS	L60	AT		18:49:00			19:13:36
51	show	Szabolcs Nyari	O-	VIS	L63	HU		18:48:00			19:16:00
52	show	J.F. Courtot	O-	VIS	M205	FR		18:44:00			19:11:00
53	show	Ulrich Bastian	O-	VIS	L80	DE		18:56:00			19:12:00
54	show	Yuri Krugly	O-	CCD	M700	UA		18:59:00			19:08:00
55	show	Jan Van Gestel	O-	VIS	M200	BE		18:46:10			19:15:55
56	show	Hans Van Den Hil	O-	VIS	M115	NL		18:54:00			19:14:00
57	show	Wojciech Burzynski	O-	VIS	M110	PL		18:46:30			19:14:30
58	show	Attila Kosa-Kiss	O?	VIS	L63	RO		18:45:00			19:16:00

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

58 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):

JPL#127 : dd913239-748a-468c-a50b-2ad3e5328393 [db: observed]

Using prediction dd913239-748a-468c-a50b-2ad3e5328393 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 227 x 141 km
a',b' = 113.4, 70.6 km
X0,Y0 = 887.6, 16.8 km
Mean diameter = 179 km

From 19 chords (?,VID,VIS,CCD)

You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 1998-03-21, 19:00 UT (JD = 2450894.292)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 130	None	5.138	323°, 32°	2.43404061389e6	16853.7	0.0°	size from AO is 152+/-15 km	2013-07-23	163.0 +/- 12.0 km	2011-03-28
# 1835	4.0	5.138	323°, 33°	2.43404061389e6	16853.7	0.0°	None	2017-06-19	164.0 +/- 3.0 km	2017-06-06

Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : dd913239-748a-468c-a50b-2ad3e5328393 [observed] Occultation Date + Time : 1998-03-21 at 18:59:06 UT +/- 0.02 min [1] Object Designation : (39) Laetitia Orbit Class : MBA Star Designation : GDR3 3345968334645285376 Star Coordinates (ICRF) : RA = 06 06 40.4837, DE = +15 32 31.764 [2] Star Magnitudes : G = 6.54 mag, RP = 5.96 mag, BP = 6.94 mag Object Magnitude : V = 11.34 mag Estimated Magnitude Drop : 4.8 mag Estimated Max. Duration : 8.8 sec Object Mean Diameter : 150 km (src: astorb) Speed of the shadow : 17.0 km/s Elongation to Moon & Sun : 174° (sunlit = 45%), Sun = 91° Cross-track uncertainty : 2.3 mas = 4 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#127 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : dd913239-748a-468c-a50b-2ad3e5328393 [observed]

 Occultation Date + Time   : 1998-03-21 at 18:59:06 UT +/- 0.02 min  [1]
 Object Designation        : (39) Laetitia
 Orbit Class               : MBA
 Star Designation          : GDR3 3345968334645285376
 Star Coordinates (ICRF)   : RA = 06 06 40.4837, DE = +15 32 31.764  [2]
 Star Magnitudes           : G = 6.54 mag, RP = 5.96 mag, BP = 6.94 mag
 Object Magnitude          : V = 11.34 mag
 Estimated Magnitude Drop  : 4.8 mag
 Estimated Max. Duration   : 8.8 sec
 Object Mean Diameter      : 150 km  (src: astorb)
 Speed of the shadow       : 17.0 km/s
 Elongation to Moon & Sun  : 174° (sunlit = 45%), Sun = 91°
 Cross-track uncertainty   : 2.3 mas = 4 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#127

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations

SiMDA \| 3D Asteroid Catalogue \| Johnston Archive \| Star at CDS (Vizier) \| JPL Small-Body Node \| Minor Planet Center \| Wikipedia

(If error 404: link not valid which means no data available)

Aladin Sky Atlas

Aladin Lite direct link (has Gaia overlay)

Collaborative Occultation Resources and Archive (CORA)

1998-03-21 / HIP 28954 / (39) Laetitia

Sky projection (artificial light) for occ. time: 1998-03-21, 19:00 UT (JD = 2450894.292)